The GEB-7 Bass Equalizer Pedal from BOSS is a 7-band graphic equalizer specially designed for bass guitars and upright bass instruments. The 7 bands offer a 15 dB boost/cut over a frequency range of 50 Hz to 10 kHz, with the 10 kHz band being a high-frequency shelf. With this versatile pedal, you can set the EQ for a high-mid/treble boost for some popping and slapping, or round off the high end and emphasize the low frequencies for a thicker tone. A level control can boost or cut overall volume to balance with your dry signal, or offer a boost while the pedal is engaged.